Last updated: August 31, 2025
Nyanza, Rwanda, in September experiences pleasant temperatures that range from a maximum of 30°C (86°F) to a comfortable average of 20°C (69°F), with a refreshing minimum of 12°C (55°F) at night. This period sees moderate precipitation, accumulating around 45 mm (1.8 in) over the month, spread across about 9 rainy days. With humidity levels hovering around 70%, the weather is both invigorating and slightly damp, creating a vibrant atmosphere for exploring the natural beauty of this region.
In September, temperatures in Nyanza, Rwanda continue to showcase the region's pleasant climate, featuring a minimum of 12°C (55°F) and an average of 20°C (69°F), peaking at a maximum of 30°C (86°F). This month serves as a gentle transition from the warmth of August, where temperatures can rise to 31°C (88°F). Overall, September maintains a consistent warmth that aligns with the patterns observed in earlier months, positioning it as a comfortable time for outdoor activities and exploration in this scenic area. The balance between cooler nights and warm days makes for ideal conditions to enjoy the vibrant landscapes that Rwanda is famous for.
In September, Nyanza experiences a moderate shift in precipitation, with 45 mm (1.8 in) of rainfall over 9 days. This marks a welcome increase from the drier months of July and August, which saw minimal rain, emphasizing a return to the region's wetter season. While September's rainfall is considerably lower than the peak in April with 163 mm (6.4 in), it's a crucial precursor to the more significant downpours expected in October and November, which typically bring around 100 mm each. This pattern highlights the cyclical nature of Nyanza's climate, where September acts as a transitional month, bridging the dry spell into the more abundant rainy season that fuels the lush landscapes of Rwanda.
In September, Nyanza experiences a moderate humidity level of 70%, which is a slight increase from the drier months of July and August, where humidity dipped to 70% and 66% respectively. This change marks a transition as the humidity begins to rise again, heading into the wetter months of October and November. Interestingly, while September's humidity remains lower than the year's peak in May at 87%, it is an early indication of the approaching rainy season, hinting at the cyclical nature of Nyanza's climate. Overall, this month reflects a gradual shift back toward the higher humidity levels typical of the region, as the effects of seasonal changes profoundly shape Nyanza's environmental patterns throughout the year.
In September, Nyanza, Rwanda experiences a UV Index of 15, maintaining its status in the extreme exposure category, with a quick burn time of just 10 minutes. This month is indicative of the intense solar radiation that prevails in the region, as it follows a summer trend where the UV Index has remained consistently high from January through September, peaking at 17 in March. As we transition from the driest months of the year, the UV Index only slightly dips by October, yet still stays at a notable 13. With these figures, it's crucial for residents and visitors alike to stay vigilant against the sun's harmful rays. For more detailed insights, check out the Nyanza UV Index.
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September in Nyanza, Rwanda, basks in 318 hours of sunshine, a splendid continuation of the vibrant, sun-drenched months that precede it. The sunshine steadily increases from January's 257 hours, reaching a peak in May with 332 hours. Throughout the year, there's a clear upward trend leading into the middle months, with summer welcoming the most sun in July and August. As the rainy season approaches, September’s hours cleverly maintain a balance, just slightly lower than its immediate predecessors but still rich in sunlight. This rhythmic dance of light showcases Nyanza's inviting climate, making it an ideal time for outdoor adventures and cultural exploration. As the year progresses, one can anticipate a consistent embrace of sunlight, with only slight dips as it heads towards the rainy months.
In Nyanza, Rwanda, September sees a 25% chance of sunny weather, reflecting a slight dip compared to the preceding month of August, which boasts the highest likelihood of sunshine at 46%. As the dry season arrives in the mid-year months of June and July, there's a noticeable increase in sunshine, peaking in August before the probability decreases again in September. This trend showcases a clear seasonal pattern, where the peak dry months yield greater sunshine, while the early stages of the rainy season, such as September, bring a reversion to more variable weather conditions. Despite this drop, September still offers opportunities for sunny days, ideal for enjoying the natural beauty of Rwanda's landscapes.
In Nyanza, Rwanda, the September daylight duration continues the region's stable trend of consistent sunlight, offering 12 hours of daylight. This consistent duration is characteristic of the month’s surrounding periods, including January through April, and re-emerges from August to October, providing a steady rhythm to daily life. Interestingly, this contrasts with the slight reduction in daylight noted in the middle months of May to July, when daylight dips to 11 hours. Overall, September embodies the hallmark of Nyanza's balanced climate, granting ample daylight that enhances the vibrancy of this beautiful region.
As September unfolds in Nyanza, Rwanda, the wind begins to take on a more noticeable presence, reaching an average speed of 1.8 m/s (4 mph). This marks a subtle yet indicative trend as the month showcases the highest wind speeds recorded since June. Throughout the year, the wind speeds have remained relatively consistent, fluctuating between 1.4 to 1.8 m/s, but September stands out as a gentle reminder of the transition towards the breezier months ahead. Following a gradual increase from the lower speeds in late winter and spring, this uptick hints at the arrival of dynamic weather patterns that enhance the vibrant landscape of Nyanza, allowing the soft whispers of wind to play amongst the hills and valleys.
Weather in Nyanza varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nyanza, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, both months display relatively mild temperatures, with average highs around 20°C (68°F) for January and slightly warmer at 20°C (69°F) in September. September tends to be drier, with only 45 mm of precipitation across approximately 9 days, while January experiences more rainfall, totaling 73 mm and lasting about 13 days. Humidity levels also rise from September’s 70% to a higher 84% in January, making the latter month feel more humid. For a closer look at January's weather conditions, you can refer to Nyanza weather in January.
In September, the weather is generally warm and pleasant, with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 30°C (86°F) and an average temperature of 20°C (69°F). There is moderate precipitation of about 45 mm (1.8 in) spread over approximately 9 days, and humidity levels are around 70%. In contrast, February offers similar temperature ranges, with a minimum of 12°C (54°F), an average of 20°C (68°F), and a maximum of 29°C (84°F). However, February is characterized by higher precipitation at 83 mm (3.3 in) over 15 days, and humidity climbs to around 82%. For more detailed information on February weather, visit Nyanza weather in February.
In comparing the weather between September and March, we see some notable differences. September generally offers warm temperatures, with an average of 20°C (69°F) and a maximum of 30°C (86°F), while March is slightly cooler, with similar averages but a maximum of 28°C (83°F). However, March experiences significantly higher precipitation at 117 mm (4.6 in) over 21 days compared to September’s 45 mm (1.8 in) over just 9 days. Additionally, March tends to be more humid, averaging 78% humidity compared to September's 70%. For a more detailed look at March weather, visit Nyanza weather in March.
September and April offer distinct weather patterns, reflecting the transitional phases of the seasons. In September, temperatures range from a minimum of 12°C (55°F) to a maximum of 30°C (86°F), with an average of 20°C (69°F). This month experiences relatively low precipitation at 45 mm (1.8 in) over about 9 days, coupled with a humidity level of 70%. Conversely, in April, the temperatures are slightly cooler on average, with a minimum of 12°C (55°F), an average of 19°C (67°F), and a maximum of 28°C (82°F). However, April is significantly wetter, receiving 163 mm (6.4 in) of rainfall across approximately 25 days, and the humidity reaches a higher level of 81%. This dramatic contrast highlights April’s tendency for more prolonged rain and higher humidity compared to the warmer and drier September. For more detailed information, you can check the Nyanza weather in April.
In comparison to May, September generally offers more favorable weather conditions. September typically has a wider temperature range, with minimums around 12°C (55°F) and maximums reaching up to 30°C (86°F), while May's temperatures are slightly cooler, with a minimum of 11°C (52°F) and a maximum of 27°C (81°F). Additionally, September experiences less precipitation, averaging 45 mm (1.8 in) over 9 days compared to May’s much wetter conditions, which see 93 mm (3.7 in) over 19 days. Notably, humidity levels are higher in May at 87%, compared to September's 70%, making September a more comfortable month overall. For more details, check Nyanza weather in May.
When comparing the weather in September and June, we see some notable similarities and differences. Both months feature an average temperature of around 20°C (68°F), but September tends to be warmer overall, with maximum temperatures reaching up to 30°C (86°F) compared to June's maximum of 28°C (82°F). Additionally, September experiences significantly more precipitation, with 45 mm (1.8 in) over 9 days, whereas June has a mere 11 mm (0.4 in) over only 2 days. Humidity levels are also higher in June, at 78%, compared to 70% in September. For more specifics on June weather, you can refer to this link: Nyanza weather in June.
In comparing the weather of September and July, one can see a few notable differences. September typically experiences a slightly wider temperature range with minimums at 12°C (55°F), averaging around 20°C (69°F), and maximums peaking at 30°C (86°F). In contrast, July holds similar average temperatures but with slightly cooler minimums at 11°C (52°F) and maximums reaching up to 29°C (84°F). Additionally, September is notably wetter, receiving about 45 mm of precipitation over 9 days, while July boasts much drier conditions with only 4 mm of rain over just 1 day. Both months maintain a consistent humidity level of 70%. For more detailed information, check out Nyanza weather in July.
In comparing the weather of September and August, September tends to be slightly cooler, with an average temperature of 20°C (69°F) compared to August's average of 21°C (70°F). Both months experience similar maximum temperatures, but September has a marginally lower minimum temperature of 12°C (55°F) compared to August's 13°C (55°F). Additionally, September sees more precipitation, totaling 45 mm (1.8 in) over 9 days, while August has less rainfall at 29 mm (1.2 in) spread across just 5 days. Humidity levels also rise slightly in September, averaging 70%, compared to 66% in August. For a more detailed look at August's weather, you can check Nyanza weather in August.
September and October exhibit similar temperature ranges, with September averaging 20°C (69°F) and October slightly cooler at 20°C (68°F). Both months experience a minimum of around 12°C (55°F), but October sees a slight dip in maximum temperatures, reaching 29°C (84°F) compared to September's peak of 30°C (86°F). However, October is notably wetter, with precipitation increasing to 102 mm (4.0 in) over 18 days, whereas September receives only 45 mm (1.8 in) over 9 days. Additionally, humidity levels rise in October to 83%, compared to September’s 70%. For more detailed information, you can check Nyanza weather in October.
In comparing the weather between September and November, both months maintain a similar minimum temperature of around 12°C (55°F), but November sees a slight decrease in average and maximum temperatures, averaging 19°C (67°F) and peaking at 29°C (84°F) compared to September's average of 20°C (69°F) and maximum of 30°C (86°F). Notably, November is significantly wetter, with precipitation reaching 101 mm (4.0 in) over 19 days, while September experiences only 45 mm (1.8 in) across 9 days. Additionally, humidity rises in November to 91%, contributing to a more damp atmosphere compared to the 70% humidity index in September. For more specific details, you can view Nyanza weather in November.
In September, temperatures range from a minimum of 12°C to a maximum of 30°C, with an average of 20°C and relatively moderate humidity at 70%. The month experiences a total precipitation of 45 mm across about 9 days, making it a drier period compared to December. In contrast, December sees slightly cooler temperatures, with a minimum of 12°C, an average of 19°C, and a maximum of 28°C. However, it is much wetter, with 97 mm of rainfall over 19 days and a higher humidity level of 92%. This significant difference in precipitation and humidity highlights the transition from the dry warmth of September to the wetter, more humid conditions of December. For more details, you can check Nyanza weather in December.
As September unfolds in Nyanza, the weather begins to shift, offering a delightful transition from the warmer months. With average temperatures lingering around a mild 20°C (69°F), the month is characterized by comfortable conditions, making it perfect for outdoor activities. The 70% humidity adds a touch of tropical feel, though the 45 mm of precipitation distributed over 9 days serves as a reminder that the rainy season is on the horizon. This blend of warmth and moisture distinguishes September from the hotter summer months, creating a unique climate that invites exploration. For a closer look at Nyanza's weather patterns throughout the year, visit Nyanza Climate.